Bazel fails if I #import <mylibrary/myheader.h> while XCode is fine with it.

Bazel asks me to change

``` objective-c
#import <mylibrary/myheader.h>
```

to

``` objective-c
#import "mylibrary/myheader.h"
```

XCode is fine with `< >` though, so I'm bound to keep coding and later have `bazel build` fail again.
